Ianto may refer to:
Ianto Davies (1892–1945), Welsh international rugby union full back Ianto Evans, Welsh-American applied ecologist, landscape architect, inventor, writer, social critic, and teacher Ianto Morgan, a fictional character in the 1939 novel How Green Was My Valley (novel) by Richard Llywellyn Ianto Jones, a fictional character in the BBC television series Torchwood
See also Ioan Siôn